/* -*- mode: javascript -*-
 *                 JavaScript for Help Bubbles (aka tooltips) 
 */

function enableTooltips(id){
var links,i,h;
if(!document.getElementById || !document.getElementsByTagName) return;
// AddCss();
h=document.createElement("span");
h.id="btc";
h.setAttribute("id","btc");
h.style.position="absolute";
document.getElementsByTagName("body")[0].appendChild(h);
if(id==null) links=document.getElementsByTagName("a");
else links=document.getElementById(id).getElementsByTagName("a");
for(i=0;i<links.length;i++){
    Prepare(links[i]);
    }
}

function Prepare(el){
  var tooltip,t,b,s,l;
  t=el.getAttribute("title");
  if(t==null || t.length==0) 
    return; /* rien si pas de title. Was: t="link:"; */
  el.removeAttribute("title");
  tooltip=CreateEl("span","tooltip");
  s=CreateEl("span","top");
  s.appendChild(document.createTextNode(t));
  tooltip.appendChild(s);

  b=CreateEl("b","bottom");
  /* url du lien:
  l=el.getAttribute("href");
  if(l.length>30) 
    l=l.substr(0,27)+"...";
  b.appendChild(document.createTextNode(l));
  */
  tooltip.appendChild(b);
  setOpacity(tooltip);
  el.tooltip=tooltip;
  el.onmouseover=showTooltip;
  el.onmouseout=hideTooltip;
  el.onmousemove=Locate;
}

function showTooltip(e){
  document.getElementById("btc").appendChild(this.tooltip);
  Locate(e);
}

function hideTooltip(e){
  var d=document.getElementById("btc");
  if(d.childNodes.length>0) 
    d.removeChild(d.firstChild);
}

function setOpacity(el){
  el.style.filter="alpha(opacity:95)";
  el.style.KHTMLOpacity="0.95";
  el.style.MozOpacity="0.95";
  el.style.opacity="0.95";
}

function CreateEl(t,c){
  var x=document.createElement(t);
  x.className=c;
  x.style.display="block";
  return(x);
}

function AddCss(){
  var l=CreateEl("link");
  l.setAttribute("type","text/css");
  l.setAttribute("rel","stylesheet");
  l.setAttribute("href","bubble.js");
  l.setAttribute("media","screen");
  document.getElementsByTagName("head")[0].appendChild(l);
}

function Locate(e){
  var posx=0,posy=0;
  if(e==null) 
    e=window.event;
  if(e.pageX || e.pageY){
    posx=e.pageX; posy=e.pageY;
  }
  else if(e.clientX || e.clientY){
    if(document.documentElement.scrollTop){
        posx=e.clientX+document.documentElement.scrollLeft;
        posy=e.clientY+document.documentElement.scrollTop;
    }
    else{
      posx=e.clientX+document.body.scrollLeft;
      posy=e.clientY+document.body.scrollTop;
    }
  }
  document.getElementById("btc").style.top=(posy+10)+"px";
  document.getElementById("btc").style.left=(posx-20)+"px";
}
